忐忑

Glyph origin
, from, and.

Etymology 1
. Earliest attestation was in the as  in . It is a word where the onsets are shared between the syllables, likely reduplicative and/or onomatopoeic in origin. Compare and , as well as ,.

Adjective

 * 1) perturbed; nervous; uneasy; fidgety

Adjective

 * 1)  sincere